Ventilator



. applied.

Patented Nov.v 28, 1944 p UNITED STATES ;OKFFICE vENTiLA'ron: Liqserxarvorvangluys, yCalif,"y y t f Appliwtimiv August 15, 194i,- serial No'. 406,972 7 zo'laim.,V (c1. :isf-ailA I This invention* relates'to `ventilators of# the type-employed for thev drawing of foul air, gases, orf' the like. throughv a stack or from an enclosure, and is more particularly directed to a ventilator of the type yadapted toA maintain a reduced l pressure -for--thepurpose of facilitating thefflow of foul air or gases are desired to be expelled. The

ventilator embodying my invention is preferably placed upon the roof ofthe structure inv such position that itis in the line of flow-of air or foul air or gases from a stack of Ventilating pipe or from an enclosure.

Ventilators of the type here under consideration are generally positioned upon ,the-roof of a, building or in other position where they are exposed to the currents of air flowing over the structure. The practicability of such a ventilator depends upon its ability .to protect the ventilating passage from a down draft of air as Well as to maintaina condition of reduced pressure facilitating the withdrawal ofthe foul air or gases from within the structure.

It is an object of my invention tol provide a ventilator having means'for maintaining a high degree of low pressure which will act to facilitate the liberation or withdrawal of foul air or gases from'within the structure to which it is'applied.

Another object of this invention is to provide a ventilator adapted to be .positioned within the air screen or wind as it passes over a structure and which uses the owof air or the wind currents irrespective of their direction of ow -for the maintenance of a low pressure Aregion for facilitating the flow of foul air yor gases from Within the structure to which the Another object of my invention is yto provide "a ventilator which includes a` drum member operating in conjunction with a multiplicity of ns positioned within -the air screen over a structure in such manner as to obstruct the now of air andvdirect the flow of air upward to produce above the stack a low pressure area into which the foul air or gases ventilated from the structure ow. f

Other objects and advantages of this invention it is believed will be apparent from the fol- -r lowing detailed description ofa preferred em-y bodiment thereof as illustrated in the accompanying drawing. t

as illustrated in the accompanying drawing, I inA dicates a funnel adapted to berconnected ywith -a stack ventilator pipe or opening through which ventilator is i 1 .wind passing Aoverv the structure Secured by suitable dividing plates 2'to the outerperiphery of the funnel I are a. plurality of curved'direction ns 3 which preferablyiextend to or near the upper end of the funnel I and terminate at an elevation above the lower end of the funnel I or above the upper elevation of the structure upon which the ventilator is mounted. The fins 3 are open at their adjacent edges 4 in the path of air or wind as may 'be indicated, for example, by the arrows 5 (Figure 2),. The wind thus passes into the air channels 6 dened by the inner periphery of the lns 3, the dividing plates 2, and the outer periphery of the funnel `I forming a multiplicity of independent stacks or air passagesupon the A outer periphery of the'funnel `I.

The upper portions of these air ychannels are preferably restricted as indicated at I in Figure 2 by the flaring section 8 of the funnel I. 'I'his around the upper end of the funnel I and fins 3 a multiple-sided protecting drum 9. This drum is' multiple-sided and the side members or sections IIJ are positioned so as to form what may be dened as a re-entry angle I I immediately adt jacent the'upper portion of the air channels 6 to conne the passage of air to these channels within the drum 9. Where the side members or sections I0 yflare outward from the re-entry angle I I, they are joinedtogether, forming at the outer surfaceof the fins 3 additional 'air passages I2 through which air which tends to vpass under the drum 9 in the direction of the arrows I3 passses to the interior of the drum 9.

In order to further confine the direction of `ow of the airv and to prevent reverse ow of air downward through the funnel I, there is mounted With-l in the interior of the multiple-sided drum 9 ade' flector vane I4 and a hood I5. The action of the vane I4 and the hood I5 is to prevent down draft of air from above, as welllas to direct theair after it passes from the -upper end of the channels and I2 upward along the inner periphery of the drum 9 as indicated by the arrows I6. f l

In the usekof this structure Ihave found that I am enabled to increase the air iiow through a ventilator embodying my invention in the neighborhood of 30 to 40% as compared with other types of ventilators showing the maintenance of the air draft due to my method of increasing the velocity of air flow. As the ventilator embodying -my invention is uniform upon its exterior it will position the air iiow channels 6 and I 2 in position to receive the air directly irrespective of the direction inwhichit is blowing orpassing over the structure. Thusl the ventilator embodying my in.. vention is a non-directional Ventilator, and which does not require means. for rotating it into tion to properly receive the air now. Asis Well understood in this art, the respective parts ofi-inym Ventilator may be suitably spot Weldedtorrsecured together by means of strap fasteners similar' to' strap fasteners 'I illustrated inythe'Belknap;:Pat-

ent N0. 1,103,734.

Having fully described my invention, iti's to be understood that I do notiwishto be limitedtothe details herein set forth, but; my, invention@V is`l of the fullscope of the appended claims` I claim:

1. In a ventilator,` the combination*.oiariunnel; a drumpositioned'to surround the upperf'endof the funnel andhaving its innerfwallispacedfitom the funnel, a hood mounteclivvitlfiin thezdrum; over y composed of a vertically extending cylindrical section and an upper flare section, a. drum member surrounding the upper portion of the funnel includingmtheiflare section and having its inner wall positioned outwardly of the funnel including the c iiarezsection",`v afmultiplicity of radially extending dividing, plates carried by the funnel extending part way into the space between the funnel and the drum, andfeachof saidfdividing: plates being providedatits outer end'witha pair of oppositely curvedns continuing, therefrom toward said drum whereby there isA denedy betweenthe.- drum and the funnel a7 plurali-ty" of independent ysubstantially enclosed vertically y extending 1 channels.

JOSEF KAROL. 

